F966USQSBBZG3 – Galaxy Z Fold7 firmware

Build F966USQSBBZG3 is a security update for the Galaxy Z Fold7 (SM-F966U) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 15, 2026 (method) and has reached 7 regions so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to F966USQUABZF1 is blocked. Samsung still serves this file.

Model
SM-F966U
Android
Android 16
Type
Security
Bootloader bit
11
First released
Jul 15, 2026
Regions
7

Rollout timeline by region

The date each region code (CSC) first received F966USQSBBZG3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ATTUSA (AT&T)Jul 15, 2026day 0F966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3
CCTUSA (Comcast)Jul 15, 2026day 0F966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3
VZWUSA (Verizon)Jul 15, 2026day 0F966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3
TMBUSA (T-Mobile)Jul 15, 2026day 0F966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3
TMKUSA (MetroPCS)Jul 15, 2026day 0F966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3
USCUSA (US Cellular)Jul 22, 2026+7 daysF966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3
XAAUSA (unlocked)Nov 1, 2026+109 daysF966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3

Download and release notes

samloader download -m SM-F966U -r XAA -v F966USQSBBZG3/F966UOYNBBZG3/F966USQSBBZG3

Samsung's release notes and security patch level for this update: SM-F966U / XAA on doc.samsungmobile.com. What each part of the build number means: decode F966USQSBBZG3.